%YAML 1.2
---
!!map {
  ? !!seq [
    !!str "Detroit Tigers",
    !!str "Chicago cubs",
    ] 
  : !!seq [
    !!str "2001-07-23",
    ],
  ? !!seq [ 
    !!str "New York Yankees",
    !!str "Atlanta Braves",
    ] 
  : !!seq [ 
    !!str "2001-07-02", 
    !!str "2001-08-12",
    !!str "2001-08-14",
    ]
  }

